JPH11286559A5 - - Google Patents

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Publication number
JPH11286559A5
JPH11286559A5 JP1998107178A JP10717898A JPH11286559A5 JP H11286559 A5 JPH11286559 A5 JP H11286559A5 JP 1998107178 A JP1998107178 A JP 1998107178A JP 10717898 A JP10717898 A JP 10717898A JP H11286559 A5 JPH11286559 A5 JP H11286559A5
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treatment
ink
film
manufactured
adhesion
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JP1998107178A
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JPH11286559A (en
JP3608941B2 (en
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Priority claimed from JP10717898A external-priority patent/JP3608941B2/en
Priority to JP10717898A priority Critical patent/JP3608941B2/en
Priority to EP99106105A priority patent/EP0947544B1/en
Priority to DE69902961T priority patent/DE69902961T2/en
Priority to KR1019990011448A priority patent/KR19990082836A/en
Priority to US09/285,389 priority patent/US6217687B1/en
Publication of JPH11286559A publication Critical patent/JPH11286559A/en
Publication of JP3608941B2 publication Critical patent/JP3608941B2/en
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Publication of JPH11286559A5 publication Critical patent/JPH11286559A5/ja
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Description

【0006】
〔式中、Rは水素原子又はメチル基、R1 及びR2 はメチル基又はエチル基、 3 びR5 はメチル基、エチル基、−(−CH2 −CH2 −O−)−H(mは1〜4の整数)又はベンジル基、R4 は炭素数1〜18のアルキル基、アルケニル基又は−(−CH2 −CH2 −O−)p −H(pは1〜4の整数)、Xはハロゲンイオン、Aは置換されても良いアルキレン基、及びnは通常101 〜104 の整数を示す。〕
[0006]
[In the formula, R represents a hydrogen atom or a methyl group; R1 and R2 represent a methyl group or an ethyl group; R3 and R5 represent a methyl group, an ethyl group, —(— CH2CH2 —O—) m —H (m is an integer of 1 to 4) or a benzyl group; R4 represents an alkyl group or alkenyl group having 1 to 18 carbon atoms or —(— CH2CH2 —O—) p —H (p is an integer of 1 to 4); X— represents a halogen ion; A represents an optionally substituted alkylene group; and n typically represents an integer of 101 to 104. ]

【0007】
しかし、この様な延伸後の酸化処理、プライマーや帯電防止剤の塗工では塗布膜形成直後のフィルムにおいては十分実用に耐え得る印刷物が得られるが、表面処理後のポリオレフィン樹脂フィルムが印刷前に高温多湿化で保管されているものであったり、製造後1年以上経過したものであると、印刷時に、特に紫外線硬化型インク(UVインク)及びオフセットインクでの印刷時に、インク転移不良を生じたり、インク密着性が実用に耐えがたい程度になることがある。
従って、紫外線硬化型インクの接着性改良を目的とした印刷フィルムとしてアルキル変性エチレンイミン系重合体のプライマー水溶液をポリオレフィン樹脂フィルム上に塗布し、乾燥して皮膜層を形成した印刷性の優れた熱可塑性樹脂フィルムが提案されている(特開平1−141736号公報)。
しかし、このものは、紫外線硬化型インクの転移性、密着性に優れたものであるが、プライマーを塗布した印刷フィルムを高温多湿下に保管したものは、紫外線硬化型インクの転移性、密着性が不十分なものが生じる。
[0007]
However, although such oxidation treatment after stretching and coating with a primer or antistatic agent can produce printed matter that is sufficiently suitable for practical use on the film immediately after the formation of the coating film, if the surface-treated polyolefin resin film has been stored in a high-temperature, high-humidity environment before printing or if more than one year has passed since its production, poor ink transfer may occur during printing, particularly when printing with ultraviolet-curable ink (UV ink) or offset ink, or the ink adhesion may become poor enough to be practically unsuitable.
Therefore, a thermoplastic resin film with excellent printability has been proposed as a printing film intended to improve the adhesion of ultraviolet-curable inks, in which an aqueous primer solution of an alkyl-modified ethyleneimine polymer is applied to a polyolefin resin film and dried to form a coating layer (Japanese Patent Laid-Open No. 1-141736).
However, although this product has excellent transferability and adhesion of ultraviolet-curable ink, when a printed film coated with a primer is stored under high temperature and humidity, the transferability and adhesion of the ultraviolet-curable ink may become insufficient.

【0019】
また、熱可塑性樹脂フィルム(i)が多層構造であって基材層(ii)ポリオレフィン系樹脂40〜100重量%と、無機微細粉末60〜0重量%を含有する樹脂組成物より成る樹脂フィルムを基材層(ii)のポリオレフィン系樹脂の融点より低い温度、好ましくは3〜60℃低い温度で縦方向に延伸し、次いで表面層(iii)がポリオレフィン系樹脂25〜100重量%と、無機微細粉末75〜0重量%を含有する樹脂組成物より成る樹脂フィルムを表面層(iii)として基材層の(ii)の少なくとも片面に積層して前段の表面処理に使用できる。
[0019]
Alternatively, the thermoplastic resin film (i) may have a multilayer structure, and the base layer (ii) may be a resin film made of a resin composition containing 40 to 100% by weight of a polyolefin resin and 60 to 0% by weight of an inorganic fine powder. This resin film is stretched in the longitudinal direction at a temperature lower than the melting point of the polyolefin resin in the base layer (ii), preferably at a temperature lower by 3 to 60°C, and then a surface layer (iii) made of a resin composition containing 25 to 100% by weight of a polyolefin resin and 75 to 0% by weight of an inorganic fine powder is laminated on at least one side of the base layer (ii) to be used in the previous surface treatment.

【0021】
[前段の表面酸化処理]
上記基材の前段の表面酸化処理としては、コロナ放電処理、フレーム処理、プラズマ処理、グロー放電処理、オゾン処理より選ばれた少なくとも1種の処理方法であり、好ましくはコロナ処理、フレーム処理である。処理量はコロナ処理の場合、600〜12,000J/m2 (10〜200W・分/m2 )、好ましくは1,200〜9,000J/m2 (20〜150W・分/m2 )である。
600J/m2 (10W・分/m2 )未満では、コロナ放電処理の効果が不十分で、その後の表面改質剤の塗工時にはじきが生じ、12,000J/m2 200W・分/m2 )超では処理の効果が頭打ちとなるので12,000J/m2 200W・分/m2 )以下で十分である。フレーム処理の場合、8,000〜200,000J/m2 、好ましくは20,000〜100,000J/m2 が用いられる。8,000J/m2 未満では、フレーム処理の効果が不十分で、その後の表面改質剤の塗工時にはじきが生じ、200,000J/m2 超では処理の効果が頭打ちとなるので200,000J/m2 以下で十分である。
[0021]
[Preliminary surface oxidation treatment]
The surface oxidation treatment of the substrate in the first stage is at least one treatment method selected from corona discharge treatment, flame treatment, plasma treatment, glow discharge treatment, and ozone treatment, preferably corona treatment or flame treatment. In the case of corona treatment, the treatment amount is 600 to 12,000 J/ m2 (10 to 200 W·min/ m2 ), preferably 1,200 to 9,000 J/ m2 (20 to 150 W·min/ m2 ).
At less than 600 J/ m2 (10 W min/ m2 ), the effect of the corona discharge treatment is insufficient, resulting in repellency when the surface modifier is subsequently applied. At more than 12,000 J/ m2 ( 200 W min/ m2 ), the effect of the treatment plateaus, so 12,000 J/ m2 ( 200 W min/ m2 ) or less is sufficient. In the case of frame treatment, 8,000 to 200,000 J/ m2 , preferably 20,000 to 100,000 J/m2 , is used. At less than 8,000 J/ m2 , the effect of the frame treatment is insufficient, resulting in repellency when the surface modifier is subsequently applied. At more than 200,000 J/ m2 , the effect of the treatment plateaus, so 200,000 J/ m2 or less is sufficient.

【0023】
(1) プライマー
プライマーとしては、例えば、ポリエチレンイミン、炭素数1〜12の範囲のアルキル変性ポリエチレンイミン、ポリ(エチレンイミン−尿素)及びポリアミンポリアミドのエチレンイミン付加物及びポリアミンポリアミドのエピクロルヒドリン付加物等のポリエチレンイミン系重合体、アクリル酸アミド−アクリル酸エステル共重合体、アクリル酸アミド−アクリル酸エステル−メタクリル酸エステル共重合体、ポリアクリルアミドの誘導体、オキサゾリン基含有アクリル酸エステル系重合体、ポリアクリル酸エステル等のアクリル酸エステル系重合体、ポリビニルピロリドン、ポリエチレングリコール、ポリビニルアルコール、ウレタン樹脂等の水溶性樹脂、またポリ酢酸ビニル、ポリウレタン、エチレン−酢酸ビニル共重合体、ポリ塩化ビニリデン、塩素化ポリプロピレン、アクリロニトリル−ブタジエン共重合体等の水分散性樹脂等を用いることができる。
[0023]
(1) Primer Examples of primers that can be used include polyethyleneimine polymers such as polyethyleneimine, alkyl-modified polyethyleneimine having 1 to 12 carbon atoms, poly(ethyleneimine-urea), ethyleneimine adducts of polyamine polyamides, and epichlorohydrin adducts of polyamine polyamides; acrylic acid amide-acrylic acid ester copolymers, acrylic acid amide-acrylic acid ester-methacrylic acid ester copolymers, polyacrylamide derivatives, oxazoline group-containing acrylic acid ester polymers, acrylic acid ester polymers such as polyacrylic acid esters; water-soluble resins such as polyvinylpyrrolidone, polyethylene glycol, polyvinyl alcohol, and urethane resins; and water-dispersible resins such as polyvinyl acetate, polyurethane, ethylene-vinyl acetate copolymer, polyvinylidene chloride, chlorinated polypropylene, and acrylonitrile-butadiene copolymer.

【0025】
(2) 架橋剤
上記プライマーに以下のような架橋剤を添加することにより、更に塗膜強度や耐水性を向上させることができる。架橋剤としては、グリシジルエーテルやグリシジルエステル等のエポキシ系樹脂、イソシアネート系、オキサゾリン系、ホルマリン系、ヒドラジド系の水分散型樹脂を挙げることができる。
架橋剤の量は、通常上記プライマー100重量部に対して1〜500重量部の範囲である。
(3) 帯電防止ポリマー
帯電防止ポリマーとしては、水溶性の窒素含有アクリル系ポリマーやスチレン−無水マレイン酸共重合体が挙げられ、特に窒素含有アクリル系ポリマーが好ましい。
[0025]
(2) Crosslinking Agent: Coating strength and water resistance can be further improved by adding the following crosslinking agents to the primer. Examples of crosslinking agents include epoxy resins such as glycidyl ethers and glycidyl esters, and water-dispersible resins such as isocyanates, oxazolines, formalins, and hydrazides.
The amount of the crosslinking agent is usually in the range of 1 to 500 parts by weight per 100 parts by weight of the primer.
(3) Antistatic Polymers Antistatic polymers include water-soluble nitrogen-containing acrylic polymers and styrene-maleic anhydride copolymers, with nitrogen-containing acrylic polymers being particularly preferred.

【0032】
上記化学式(イ)、(ロ)、(ハ)、(ニ)で表される四級窒素含有単量体の重合体は、その前駆体の級窒素含有単量体を重合させてから、アルキルハライド、ジメチル硫酸、モノクロロ酢酸エステル等のカチオン化剤により四級化することによって重合体に存在させることができることはいうまでもない。
本発明では帯電防止剤は水溶性であることが必要であるが、過度に水溶性であることは望ましくない。従って、(A)成分の四級窒素含有重合体は、疎水性単量体との共重合体であることが望ましい。疎水性単量体としては、スチレン又はその核ないし側鎖置換体、アクリルないしメタクリル酸エステル、ハロゲン化ビニルその他がある。
[0032]
It goes without saying that the polymers of the quaternary nitrogen-containing monomers represented by the above chemical formulas (A), (B), (C), and (D) can be made to exist in the polymer by polymerizing their precursor tertiary nitrogen-containing monomers and then quaternizing them with a cationizing agent such as alkyl halide, dimethyl sulfate, or monochloroacetic acid ester.
In the present invention, the antistatic agent must be water-soluble, but excessive water solubility is not desirable. Therefore, the quaternary nitrogen-containing polymer of component (A) is preferably a copolymer with a hydrophobic monomer. The hydrophobic monomer may be styrene or its nucleus or side chain substitution, acrylic or methacrylic acid ester, vinyl halide, or the like.

【0033】
好適な帯電防止剤重合体
本発明において、特に好ましい(A)成分の帯電防止剤重合体は下記の(a)〜(c)成分の共重合体からなるものである。
(a)成分:化学式(イ)〜(ニ)で表される四級窒素含有単量体 20〜40重量%
(b)成分:次の一般式で表される単量体 40〜80重量%
【化6】
[式中、R1 は水素原子又はメチル基、R5 は炭素数が1〜22のアルキル基、炭素数が7〜22のアラルキル基、若しくは炭素数5〜22のシクロアルキル基を表す。]
(c)成分:他の疎水性ビニル単量体 0〜20重量%
最も好適な帯電防止剤重合体
本発明において、最も好適な(A)成分の帯電防止剤重合体は、(a)成分の四級窒素含有単量体が前記の単量体(イ)においてX- がCl- であるものである。
[0033]
Suitable Antistatic Polymers In the present invention, the particularly preferred antistatic polymer (A) is a copolymer of the following components (a) to (c).
Component (a): 20 to 40% by weight of a quaternary nitrogen-containing monomer represented by chemical formulas (a) to (d)
Component (b): 40 to 80% by weight of a monomer represented by the following general formula:
[C6]
[In the formula, R1 represents a hydrogen atom or a methyl group, and R5 represents an alkyl group having 1 to 22 carbon atoms, an aralkyl group having 7 to 22 carbon atoms, or a cycloalkyl group having 5 to 22 carbon atoms.]
Component (c): Other hydrophobic vinyl monomers 0 to 20% by weight
Most Suitable Antistatic Polymer In the present invention, the most suitable antistatic polymer of component (A) is one in which the quaternary nitrogen-containing monomer of component (a) is the above-mentioned monomer (a) in which X is Cl .

【0045】
延伸倍率は、特に限定されず、目的と使用する熱可塑性樹脂の特性により適宜選択される。例を挙げると、熱可塑性樹脂としてポリプロピレンないしはその共重合体を使用する時には一方向に延伸する場合は約1.2〜12倍、好ましくは2〜10倍であり、二軸延伸の場合には面積倍率で1.5〜60倍、好ましくは10〜50倍である。その他の熱可塑性樹脂を使用する時には一方向に延伸する場合は1.2〜10倍、好ましくは2〜5倍であり、二軸延伸の場合には面積倍率で1.5〜20倍、好ましくは4〜12倍である。更に、必要に応じて延伸温度より高温での熱処理が施される。
[0045]
The stretching ratio is not particularly limited and is appropriately selected depending on the purpose and the properties of the thermoplastic resin used. For example, when polypropylene or its copolymer is used as the thermoplastic resin, the stretching ratio in one direction is about 1.2 to 12 times, preferably 2 to 10 times, and in the case of biaxial stretching, the area ratio is 1.5 to 60 times, preferably 10 to 50 times. When other thermoplastic resins are used, the stretching ratio in one direction is 1.2 to 10 times, preferably 2 to 5 times, and in the case of biaxial stretching, the area ratio is 1.5 to 20 times, preferably 4 to 12 times. Furthermore, if necessary, heat treatment is performed at a temperature higher than the stretching temperature .

【0048】
[後段の表面酸化処理]
上記基材の後段の表面酸化処理としては、コロナ放電処理、フレーム処理、プラズマ処理、グロー放電処理、オゾン処理より選ばれた処理方法で、好ましくはコロナ処理、フレーム処理であり、より好ましくはコロナ処理である。
処理量はコロナ処理の場合、600〜12,000J/m2 (10〜200W・分/m2 )、好ましくは1,200〜9,000J/m2 (20〜150W・分/m2 )である。600J/m2 (10W・分/m2 )未満では、コロナ放電処理の効果が不十分で、その後の表面改質剤の塗工時にはじきが生じ、12,000J/m2 200W・分/m2 )超では処理の効果が頭打ちとなるので12,000J/m2 200W・分/m2 )以下で十分である。フレーム処理の場合、8,000〜200,000J/m2 、好ましくは20,000〜100,000J/m2 が用いられる。8,000J/m2 未満では、フレーム処理の効果が不十分で、その後の表面改質剤の塗工時にはじきが生じ、200,000J/m2 超では処理の効果が頭打ちとなるので200,000J/m2 以下で十分である。
[0048]
[Subsequent surface oxidation treatment]
The subsequent surface oxidation treatment of the substrate is a treatment method selected from corona discharge treatment, flame treatment, plasma treatment, glow discharge treatment and ozone treatment, preferably corona treatment and flame treatment, more preferably corona treatment.
In the case of corona treatment, the treatment amount is 600 to 12,000 J/ m2 (10 to 200 W·min/ m2 ), preferably 1,200 to 9,000 J/ m2 (20 to 150 W·min/ m2 ). If it is less than 600 J/ m2 (10 W·min/ m2 ), the effect of the corona discharge treatment is insufficient, and repellency occurs when the surface modifier is subsequently applied. If it exceeds 12,000 J/ m2 ( 200 W·min/ m2 ), the effect of the treatment reaches a plateau, so 12,000 J/ m2 ( 200 W·min/ m2 ) or less is sufficient. In the case of frame treatment, 8,000 to 200,000 J/ m2 , preferably 20,000 to 100,000 J/ m2 is used. If the intensity is less than 8,000 J/ , the effect of the flame treatment will be insufficient, and repellency will occur when the surface modifier is subsequently applied. If the intensity exceeds 200,000 J/ , the effect of the treatment will plateau, so 200,000 J/ or less is sufficient.

【0061】
II ]熱可塑性樹脂フィルムの作製
<実施例1>
(1)樹脂シート
製造例1(P1)
メルトフローレート(MFR)0.8g/10分のポリプロピレンに、平均粒径1.5μmの重質炭酸カルシウム15重量%を配合した組成物(C')を、240℃に設定した押し出し機にて混練した後、シート状に押し出し、冷却装置にて冷却して無延伸シートを得た。
尚、上記のシート状に押し出した組成物及び以下の押出や積層に使用する組成物には、使用するポリプロピレンと炭酸カルシウムの合計量100部にして−メチル−2,6−ジ−t−ブチルフェノール0.05部とフェノール系安定剤であるイルガノックス1010(チバガイキー社製、商品名)0.05部、リン系安定剤であるウエストン618(ボーグワーナー(株)製、商品名)0.05部を配合した。
[0061]
[ II ] Preparation of thermoplastic resin film <Example 1>
(1) Resin sheet production example 1 (P1)
Composition (C') was prepared by blending 15% by weight of heavy calcium carbonate having an average particle size of 1.5 μm with polypropylene having a melt flow rate (MFR) of 0.8 g/10 min. The mixture was kneaded in an extruder set at 240°C, extruded into a sheet, and cooled in a cooling device to obtain an unstretched sheet.
The composition extruded into the sheet form described above and the composition used in the following extrusion and lamination processes were blended with 0.05 part of 4 -methyl-2,6-di-t-butylphenol, 0.05 part of Irganox 1010 (trade name, manufactured by Ciba-Geiky Co.), a phenolic stabilizer, and 0.05 part of Weston 618 (trade name, manufactured by Borg-Warner Co.), a phosphorus-based stabilizer, per 100 parts of the total amount of polypropylene and calcium carbonate used.

【0063】
(2)前段の酸化処理
上記5層積層物(P1)の表の面に以下のようなコロナ放電処理を行った。
コロナ放電処理機は春日電気(株)製コロナ放電処理機HFS400Fを用い、アルミ電極、トリータロールにはシリコーン被覆ロールを用い、電極とロールとのギャップを2mmとし、ライン速度約30m/分、印加エネルギー密度100W・分/m2 にて処理を行った。
(3)前段の表面改質剤の塗布
ついで、上記のコロナ放電処理を行った表面に、上記「前段の表面改質剤の調製」の項に示した表面改質剤(G1)を約9g/m2 の乾燥前塗工量(乾燥時の塗工量は約0.23g/m2 )になるように塗布し、下記のテンターオーブンに導いた。
[0063]
(2) Pre-oxidation Treatment The front surface of the five-layer laminate (P1) was subjected to the following corona discharge treatment.
The corona discharge treatment was performed using a corona discharge treatment machine HFS400F manufactured by Kasuga Electric Co., Ltd., with an aluminum electrode and a silicone-coated treater roll, with a gap between the electrode and roll of 2 mm, a line speed of approximately 30 m/min, and an applied energy density of 100 W·min/ .
(3) Application of the surface modifier in the first stage Next, the surface modifier (G1) shown in the above section "Preparation of the surface modifier in the first stage " was applied to the surface that had been subjected to the above corona discharge treatment so as to give a coating amount before drying of approximately 9 g/ m2 (coating amount when dried of approximately 0.23 g/ m2 ), and the resultant was introduced into the tenter oven described below.

【0065】
(6)後段の表面改質剤の塗布
上記「後段の表面改質剤の調製」の項に示した(J1)をロールコーターにて乾燥後の塗工量が0.06g/m2 となるように塗工し、約65℃の温度で数十秒乾燥させたものを巻き取り、表面改質された熱可塑性樹脂フィルムを得た。このもののインク密着性、耐湿性、耐水性、帯電防止性等の評価を、以下に示す方法で行った。
[0065]
(6) Coating of the subsequent surface modifier (J1) described in the above section "Preparation of the subsequent surface modifier" was applied using a roll coater so that the coating amount after drying was 0.06 g/ m2 , and the film was dried at a temperature of about 65°C for several tens of seconds and wound up to obtain a surface-modified thermoplastic resin film . The ink adhesion, moisture resistance, water resistance, antistatic properties, etc. of this film were evaluated using the methods shown below.

【0066】
[III]評価
UVオフセットインクの密着性、帯電防止性能は以下の測定方法によって評価した。
(1)インク密着性の測定
得られたフィルムを、紫外線硬化型インク(東華色素化学工業(株)製、ベストキュアー161(墨))をRIテスター(明製作所製)で1.5g/m2 となるよう展色し、アイグラフィック(株)社製メタルハライドランプ灯(80W/cm)1灯の下10cmの所を10m/分の速度で1回通過させ照射、乾燥した。その面にセロテープ(ニチバン(株)製の粘着テープ)を貼り付け十分密着させた後、素早く剥離してインクの密着性を次の5段階で評価した。
5;全くインクが剥離しない(実用上問題ない)。
4;僅かな部分のインクが剥離した(実用上問題ない)。
3;剥離部分が25%以下であった(実用上問題ない)。
2;剥離部分が25〜50%程度であった(実用上やや問題あり)。
1;剥離部分が50%以上であった(実用上問題あり)。
実施例1は、5のレベルであった。結果を表1に示した。
[0066]
[III] Evaluation The adhesion and antistatic properties of the UV offset ink were evaluated by the following measurement methods.
(1) Measurement of ink adhesion The obtained film was coated with ultraviolet-curable ink (Bestcure 161 (black) manufactured by Toka Dye Chemical Co., Ltd.) using an RI tester (manufactured by Akebono Seisakusho) at a coverage of 1.5 g/ , and then irradiated and dried by passing it once 10 cm from under a metal halide lamp (80 W/cm) manufactured by Eye Graphics Co., Ltd. at a speed of 10 m/min. Scotch tape (adhesive tape manufactured by Nichiban Co., Ltd.) was applied to the surface to ensure sufficient adhesion, and then quickly peeled off, and the ink adhesion was evaluated on the following five-point scale.
5: The ink did not peel off at all (no practical problem).
4: A small amount of ink peeled off (no practical problem).
3: Peeling was 25% or less (no problem in practical use).
2: Peeling occurred at about 25 to 50% (somewhat problematic in practical use).
1: Peeling occurred at 50% or more (problems in practical use).
Example 1 was at level 5. The results are shown in Table 1.

【0067】
(2)耐湿性の評価:高温多湿下に保管後のUVインクの転移性
得られたフィルムを40℃の温度、相対湿度80%の雰囲気下に保管した後RIテスター(明製作所製)にて紫外線硬化型インク(東華色素化学工業(株)製L−カートン(墨))を1.5g/m2 となるよう展色し、前記同様メタルハライドランプにて照射乾燥させた。その後マクベス濃度計(米国コルモーゲン社製)にて光反射濃度(マクベス濃度)を測定し、展色面に塗布筋、白抜け等の転移不良がないかどうかを目視にて観察し次の5段階にて評価した。
5;大変良い。
4;良い。
3;転移インキの色が薄いが実用上支障がない
2;転移インキの色が薄く塗布筋が見える(実用上問題あり)。
1;ほとんど転移しない(実用上問題あり)。
実施例1は、5のレベルであった。結果を表1に示した。
[0067]
(2) Evaluation of moisture resistance: UV ink transferability after storage under high temperature and humidity conditions After storing the obtained film under an atmosphere of 40°C and a relative humidity of 80%, an ultraviolet-curable ink (L-Carton (black ink) manufactured by Toka Dye Chemical Co., Ltd.) was applied to the film using an RI tester (manufactured by Akebono Seisakusho) to a coating density of 1.5 g/ , and the film was dried by irradiating it with a metal halide lamp in the same manner as above. Thereafter, the light reflection density (Macbeth density) was measured using a Macbeth densitometer (manufactured by Kollmorgen, USA). The applied surface was visually inspected for poor transfer such as coating streaks and white spots, and the result was evaluated using the following five-point scale.
5: Very good.
4: Good.
3: The color of the transferred ink is light, but this does not cause any problems in practical use .
2: The color of the transferred ink is light and application lines are visible (problem in practical use).
1: Almost no metastasis (problems in practical use).
Example 1 was at level 5. The results are shown in Table 1.

【0068】
(3)耐水性:浸水後のインク密着性
(1)の評価にて得られた印刷後のフィルムを3日間水に浸し、(1)と同様の方法でインクの密着性を評価した。判定方法も(1)と同様に行った。
実施例1は、5のレベルであった。結果を表1に示した。
(4)表面固有抵抗
得られたフィルムの帯電防止性能として、表面固有抵抗を23℃の温度、50%の相対湿度の条件下で、東亜電波工業(株)製DSM−8103(商品名)を用いて測定した。表面固有抵抗値が1.0E+12Ω/□以下のものは印刷時の給排紙性が良好と判断する。
実施例1は、2.5E+10Ω/□であった。結果を表1に示した。
[0068]
(3) Water resistance: Ink adhesion after immersion The printed film obtained in the evaluation of (1) was immersed in water for 3 days, and the ink adhesion was evaluated in the same manner as in (1). The evaluation method was also the same as in (1).
Example 1 was at level 5. The results are shown in Table 1.
(4) Surface Resistivity: The surface resistivity of the obtained film was measured at a temperature of 23° C. and a relative humidity of 50% using a DSM-8103 (trade name) manufactured by Toa Denpa Kogyo Co., Ltd. A film having a surface resistivity of 1.0E+12 Ω/□ or less was judged to have good paper feeding and ejection properties during printing.
The resistance was 2.5E+10Ω/□ in Example 1. The results are shown in Table 1.

【0074】
<実施例12>
下記のものを延伸前の樹脂シートとして用いた。
横延伸前樹脂シートの製造例4(P4)
横延伸前樹脂シートの製造例3(P3)におけるC’のみの無延伸シートに実施例1と同様の条件で前段のコロナ放電処理を施した後、前段の表面改質剤G1を乾燥後の塗工量が0.35g/m2 )となるよう塗工し、乾燥炉を通して乾燥した後140℃の温度に加熱し、縦方向にロール間の周速差を利用して5倍延伸し、単層の縦1軸延伸シートを得た。このものに80W・分/m2 の条件でコロナ放電処理を行った後、表面改質剤J1を乾燥後の塗工量が0.08g/m2 となるよう塗工した。このものの評価結果を表3に示した。
[0074]
Example 12
The following resin sheets were used before stretching.
Production Example 4 (P4) of Resin Sheet Before Transverse Stretching
The unstretched sheet of only C' in Production Example 3 (P3) of the resin sheet before transverse stretching was subjected to a first-stage corona discharge treatment under the same conditions as in Example 1, and then the first-stage surface modifier G1 was applied so that the coating amount after drying was 0.35 g / m 2 ), dried through a drying oven, heated to a temperature of 140 ° C, and stretched 5 times in the longitudinal direction using the difference in peripheral speed between the rolls to obtain a single-layer longitudinally uniaxially stretched sheet. This was subjected to a corona discharge treatment under a condition of 80 W min / m 2 , and then surface modifier J1 was applied so that the coating amount after drying was 0.08 g / m 2. The evaluation results of this product are shown in Table 3.

【0076】
<比較例8〜10
使用する樹脂シートそれぞれP2、P3、Pとを変更し、前段の酸化処理、表面改質剤の塗布を行わない以外は、実施例1と同様にフィルムを製造し、表面処理、評価を行った。結果を表5に示した。
[0076]
<Comparative Examples 8 to 10 >
The resin sheets used were changed to P2, P3, and P4, respectively, and films were produced, surface-treated, and evaluated in the same manner as in Example 1, except that the previous oxidation treatment and application of the surface modifier were not performed. The results are shown in Table 5.

【0080】
【表4】
[0080]
[Table 4]

【0081】
【表5】
[0081]
[Table 5]

Claims (1)

酸化処理が、10〜200W・分/m2 で行われるコロナ処理、又は8,000〜200,000J/m2 で行われるフレーム処理であることを特徴とする請求項に記載の表面処理方法。9. The surface treatment method according to claim 8 , wherein the oxidation treatment is a corona treatment carried out at 10 to 200 W·min/m <2> or a flame treatment carried out at 8,000 to 200,000 J/m <2> .
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DE69902961T DE69902961T2 (en) 1998-04-03 1999-04-01 Process for the surface treatment of a thermoplastic resin film
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